[patch] Add discriminator support to gas .loc directive

[Dave Korn]

Cary Coutant wrote:

> bfd/ChangeLog:
> 
> * dwarf2.c (decode_line_info): Ignore DW_LNE_set_discriminator.


  I can't approve this, but it WJFFM and I think it is right.

    cheers,
      DaveK